The XSetWMName convenience
function calls XSetTextProperty to set the WM_NAME property.

The XGetWMName
convenience function calls XGetTextProperty to obtain the WM_NAME property.
It returns a nonzero status on success; otherwise, it returns a zero status.

The XStoreName function assigns the name passed to window_name to the
specified window. A window manager can display the window name in some prominent
place, such as the title bar, to allow users to identify windows easily.
Some window managers may display a window's name in the window's icon, although
they are encouraged to use the window's icon name if one is provided by
the application. If the string is not in the Host Portable Character Encoding,
the result is implementation-dependent.

XStoreName can generate BadAlloc
and BadWindow errors.

The XFetchName function returns the name of
the specified window. If it succeeds, it returns a nonzero status; otherwise,
no name has been set for the window, and it returns zero. If the WM_NAME
property has not been set for this window, XFetchName sets window_name_return
to NULL. If the data returned by the server is in the Latin Portable Character
Encoding, then the returned string is in the Host Portable Character Encoding.
Otherwise, the result is implementation-dependent. When finished with it,
a client must free the window name string using XFree.